Refactoring diagnostic tests in multiple files.

server/lib/diagnostic/uri.ts

@@ -0,0 +1,15 @@
+import { newResult, TestResult } from './utils'
+
+export async function diagUri (test: string, settingsManager: PluginSettingsManager): Promise<TestResult> {
+  const result = newResult(test)
+  result.label = 'External Webchat using an iframe'
+  const settings = await settingsManager.getSettings([
+    'chat-uri'
+  ])
+  if (/^https:\/\//.test(settings['chat-uri'] as string)) {
+    result.ok = true
+  } else {
+    result.messages.push('Incorrect value for the uri (it does not start with https://)')
+  }
+  return result
+}